body {
    background-color: #1D1D1D;
}

.face {
    cursor: default;
    position: fixed;
    user-select: none;
    pointer-events: none;
    -ms-user-select: none;
    -moz-user-select: none;
    -webkit-user-select: none;
}

/* 渐变动画配置 */
@keyframes FaceTracking {
    0% {
        opacity: 1;
    }
    10% {
        opacity: 1;
    }
    20% {
        opacity: 1;
    }
    30% {
        opacity: 1;
    }
    40% {
        opacity: 0.9;
    }
    50% {
        opacity: 0.9;
    }
    60% {
        opacity: 0.8;
    }
    70% {
        opacity: 0.7;
    }
    80% {
        opacity: 0.6;
    }
    90% {
        opacity: 0.5;
    }
    100% {
        opacity: 0;
        transform: translate3D(0, -20px, 0) scale(5) rotate(45deg);
    }
}